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The Plant Guide

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Crambe cordifolia

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This species is notable in stature, forming a giant mound and producing a profusion of airy white flowers on tall stems in late spring to midsummer and then dying down in midsummer to late summer. Colewort can reach 8 feet high and about half as wide. Grow in a large border or open woodland.

Noteworthy CharacteristicsLarge leaves and abundant flowers.

CarePrefers fertile, well-drained soil in full sun, but will tolerate poorer soils in partial shade. It is susceptible to rot in moist soils, and may be short-lived. It tends to survive winters beyond Zone 6.

PropagationSow seed in a cold frame in spring or fall.

ProblemsClubroot, black rot, slugs, snails.

  • Genus : Crambe
  • Plant Width : 3 to 6 feet
  • Zones : 6, 7, 8, 9
  • Plant Height : 6 to 10 feet
  • Moisture : Dry to Medium
  • Bloom Time : Early Summer, Late Spring, Spring, Summer
  • Growth Rate : Fast
  • Light : Full Sun to Partial Shade
  • Maintenance : Low
  • Plant Type : Perennials
  • Characteristics : Self Seeds, Showy Foliage
  • Plant Seasonal Interest : Spring Interest
  • Flower Color : White
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